From f75231ab48cb0494aaf4a92eb9a1a77c1275d599 Mon Sep 17 00:00:00 2001
From: Felix Ableitner <me@nutomic.com>
Date: Mon, 10 Mar 2025 17:44:52 +0100
Subject: [PATCH] Add note about faster rsa key generation

---
 src/http_signatures.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/http_signatures.rs b/src/http_signatures.rs
index f30e75c..ca6a02f 100644
--- a/src/http_signatures.rs
+++ b/src/http_signatures.rs
@@ -54,6 +54,10 @@ impl Keypair {
 }
 
 /// Generate a random asymmetric keypair for ActivityPub HTTP signatures.
+///
+/// Note that this method is very slow in debug mode. To make it faster, follow
+/// instructions in the RSA crate's readme.
+/// https://github.com/RustCrypto/RSA/blob/master/README.md
 pub fn generate_actor_keypair() -> Result<Keypair, Error> {
     let mut rng = rand::thread_rng();
     let rsa = RsaPrivateKey::new(&mut rng, 2048)?;